Distance from Harlingen, TX to Round Rock, TX is 343Miles or 552 Km. You can get this distance about 5 hours 1 min. If you want to planning travel with plane for 299 Miles or 481 Km, You can get this distance about 1 hours 8 mins .
A car with an average MPG will needs 15.88 gallons of gas to get the route between these points.
The estimated cost of gas to get between Harlingen, TX and Round Rock, TX is $36.05.
During the route, an average car will release 311.12 pounds of CO2 to the atmosphere. Your carbon footprint is 0.91 pounds of CO2 per mile.
* Average US MPG used for calculations is 21.6 MPG.
* Average US gas price used for calculation is 2.27 per gallon.